You can get an FAA medical and apply for a SODA (Statement of Demonstrated Ability)
May be a bit of hassle to organise as it requires you to do a flight tests with an FAA examiner which will likely have to happen in the States.
The CAA also allows monocular folks to fly but there where quite stringent restrictions associated with that (as in no pax etc) but that was pre JAR when I last looked into that for a patient of mine, not sure if that still is the case under JAR.
Best thing to do is give them a ring and hear it from the horse's mouth.
Good luck